Question

A rise of 20% in the price of rice force a person to buy 4 kg of rice less for rupees 840 .find (i)the reduced price per kg (ii) the original price per kg​

Answer 1

Step-by-step explanation:

1) 20/100×840/4

=42₹

2) 20/120×840/4

=35₹

Answer 2

Answer:

Ans.(i)Rupees 35     (ii)Rupees 42

Step-by-step explanation:

Solution:-

Increased Price= 20% of Rupees 840=20/100  X 840=Rupees 168

Since there is an increase of 20% in price,a person buys 4 kg of rice less

So,Increased Price=Increased Price of 4 Kg Rice

=>168=Increased Price of 4 Kg Rice

=>168/4=Increased Price of 1 Kg Rice

=>Rupees 42=Increased Price of 1 Kg Rice......................................(i)

Let Original Price of 1 Kg Rice=x

Rise (increase)of 20% in original Price=x+(20% of x)

Increased Price of 1 Kg=x+20x/100=   (100x+20x)/100=120x/100

=>120x/100=Increased Price of 1 Kg Rice................................................(ii)

From equation (i) and (ii)

120x/100=42

120x=42 X 100

x=(42 X 100)/120=35

Original Price of 1 Kg=x =Rupees 35

Ans.(i)Rupees 35     (ii)Rupees 42